Series 1250 Pneumatic Chemical Injection Pump
Operating Manual
Page 12 of 19
To ensure accurate stroke rate measurement, allow sufficient measurement duration. Count all
exhaust discharges for at least thirty (30) seconds, then convert to a stroke per minute rate. When
attempting to control the pump at a frequency lower than 2 strokes per minute, time at least three
strokes, then divide by the number of minutes to calculate the stroke per minute rate.
3.2.2.4 Finally, ensure that the Target Stroke Rate does not exceed the maximum recommended stroke rate. If the
Target Stroke Rate exceeds the maximum recommended stroke rate for the type of service you intend, it will be
necessary to use a larger plunger size:
FIGURE 6: MAXIMUM RECOMMENDED STROKE RATE, SERIES 1250
TYPE OF SERVICE
MAXIMUM RECOMMENDED
STROKE RATE
CONTINUOUS USE
105 STROKES PER MINUTE
INTERMITTENT USE
140 STROKES PER MINUTE
3.2.2.5 Assuming your pump is correctly sized, simply adjust the speed control valve on your pump until the Target
Stroke Rate is achieved.
CP/MAN-PRD-015 REV. 15 EFF. DATE: 07/08/2022
